Last year Fodor's Travel Guides named "Autumn at the Dallas Arboretum" as "One of America's Best Pumpkin Festivals." Oh, it's that and more. The Arboretum's fall festival of giant orange squash, running through November 25, offers a lot more than thousands of uncut jack-o'-lanterns. When the searing Dallas heat begins to subside and you can almost consider wearing a jacket, the fest on the landscaped park east of White Rock Lake is the perfect time and place to stroll among 150,000 blooming flowers scattered lavishly across 66 acres of beds and lawn. If Charlie Brown's Great Pumpkin existed, he'd come here to celebrate.